Bill Monroe's bluegrass song Blue Moon of Kentucky was released by Elvis Presley on the B-side of his first ever single. What was that song? 
That's All Right
-1
Section::::Abstract.
That's All Right
1590207
-1
Section::::Abstract.
That's All Right
1590207
-1
Section::::Abstract.
That's All Right
1590207
-1
Section::::Abstract.
Blue Moon of Kentucky
2088377